[ceph-client:tls-tracing-only 10/14] fs/ceph/debugfs.c:420:3: error: call to undeclared function 'rtlog_log_iter_init'; ISO C99 and later do not support implicit function declarations

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/ceph/ceph-client.git tls-tracing-only
head:   ffad14ce035a047cbfda2d38f7ae37b0767de136
commit: 310aa14b5bf4d5ecd1abf6a00782e044f7d76940 [10/14] ceph integration
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250808/202508080007.MgUCTMaC-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250808/202508080007.MgUCTMaC-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508080007.MgUCTMaC-lkp@intel.com/

All errors (new ones prefixed by >>):

   fs/ceph/debugfs.c:367:19: warning: variable 'seconds' set but not used [-Wunused-but-set-variable]
     367 |     unsigned long seconds;
         |                   ^
   fs/ceph/debugfs.c:416:13: error: use of undeclared identifier 'g_rtlog_logger'
     416 |         spin_lock(&g_rtlog_logger.lock);
         |                    ^
   fs/ceph/debugfs.c:418:28: error: use of undeclared identifier 'g_rtlog_logger'
     418 |         list_for_each_entry(ctx, &g_rtlog_logger.contexts, list) {
         |                                   ^
   fs/ceph/debugfs.c:418:28: error: use of undeclared identifier 'g_rtlog_logger'
   fs/ceph/debugfs.c:418:28: error: use of undeclared identifier 'g_rtlog_logger'
   fs/ceph/debugfs.c:418:28: error: use of undeclared identifier 'g_rtlog_logger'
>> fs/ceph/debugfs.c:420:3: error: call to undeclared function 'rtlog_log_iter_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     420 |                 rtlog_log_iter_init(&iter, &ctx->pf);
         |                 ^
>> fs/ceph/debugfs.c:431:19: error: call to undeclared function 'rtlog_log_iter_next'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     431 |                 while ((entry = rtlog_log_iter_next(&iter)) != NULL) {
         |                                 ^
   fs/ceph/debugfs.c:431:17: error: incompatible integer to pointer conversion assigning to 'struct rtlog_log_entry *' from 'int' [-Wint-conversion]
     431 |                 while ((entry = rtlog_log_iter_next(&iter)) != NULL) {
         |                               ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
>> fs/ceph/debugfs.c:436:19: error: call to undeclared function 'rtlog_is_valid_kernel_addr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     436 |                         if (!entry || !rtlog_is_valid_kernel_addr(entry)) {
         |                                        ^
   fs/ceph/debugfs.c:423:7: warning: variable 'ctx_entries' set but not used [-Wunused-but-set-variable]
     423 |                 int ctx_entries = 0;
         |                     ^
   fs/ceph/debugfs.c:481:15: error: use of undeclared identifier 'g_rtlog_logger'
     481 |         spin_unlock(&g_rtlog_logger.lock);
         |                      ^
   fs/ceph/debugfs.c:502:24: error: use of undeclared identifier 'g_rtlog_logger'
     502 |     spin_lock_irqsave(&g_rtlog_logger.lock, flags);
         |                        ^
   fs/ceph/debugfs.c:506:31: error: use of undeclared identifier 'g_rtlog_logger'
     506 |     list_for_each_entry(ctx, &g_rtlog_logger.contexts, list) {
         |                               ^
   fs/ceph/debugfs.c:506:31: error: use of undeclared identifier 'g_rtlog_logger'
   fs/ceph/debugfs.c:506:31: error: use of undeclared identifier 'g_rtlog_logger'
   fs/ceph/debugfs.c:506:31: error: use of undeclared identifier 'g_rtlog_logger'
   fs/ceph/debugfs.c:516:29: error: use of undeclared identifier 'g_rtlog_logger'
     516 |     spin_unlock_irqrestore(&g_rtlog_logger.lock, flags);
         |                             ^
   2 warnings and 16 errors generated.


vim +/rtlog_log_iter_init +420 fs/ceph/debugfs.c

   405	
   406	static int rtlog_tls_show_internal(struct seq_file *s, void *p)
   407	{
   408		struct rtlog_tls_ctx *ctx;
   409		struct rtlog_log_iter iter;
   410		struct rtlog_log_entry *entry;
   411		const struct rtlog_source_info *source;
   412		int total_entries = 0;
   413		int total_contexts = 0;
   414	
   415		/* Lock the logger to safely traverse the contexts list */
 > 416		spin_lock(&g_rtlog_logger.lock);
   417	
 > 418		list_for_each_entry(ctx, &g_rtlog_logger.contexts, list) {
   419			/* Initialize iterator for this context's pagefrag */
 > 420			rtlog_log_iter_init(&iter, &ctx->pf);
   421			int pid = ctx->pid;
   422			char *comm = ctx->comm;
   423			int ctx_entries = 0;
   424	
   425			total_contexts++;
   426	
   427			/* Lock the pagefrag before accessing entries */
   428			spin_lock_bh(&ctx->pf.lock);
   429	
   430			/* Iterate through log entries in this context */
 > 431			while ((entry = rtlog_log_iter_next(&iter)) != NULL) {
   432				char datetime_str[32];
   433				char reconstructed_msg[256];
   434	
   435				/* Validate entry before processing */
 > 436				if (!entry || !rtlog_is_valid_kernel_addr(entry)) {
   437					seq_printf(s, "[%d][%s]: Invalid entry pointer %p\n", pid, comm, entry);
   438					break;
   439				}
   440	

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